Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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[Logical Equivalences]
Using a truth table, determine whether the expression (p → q)∨(¬r → ¬q) is equivalent to ¬r → ¬p or not (as usual, assume that the operator ¬ has the highest priority). Important: your truth table cannot just show the columns for (p → q) ∨ (¬r → ¬q) and ¬r → ¬p. You also have to show the intermediate steps, i.e. some of the intermediate columns.
Transcribed Image Text:Using a truth table, determine whether the expression (p → q) V (¬r → ¬q) is equivalent to -r → -p
or not (as usual, assume that the operator
cannot just show the columns for (p → q) ^ (¬r → ¬q) and ¬r → -p. You also have to show the
intermediate steps, i.e. some of the intermediate columns.
- has the highest priority). Important: your truth table
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